Psychological, suspenseful book recommendations?

I just finished “tender is the flesh” and I’ve just been thinking about it nonstop since finishing it. I felt the same way when I read “1984” by George Orwell. What books can you recommend that kind of leave you feeling disturbed. Not necessarily horror, but something more psychological? I’m not really into murder mysteries unless they’re really shocking. I want to be shocked and disturbed. Also , not looking for anything that is super gory or involving hurting babies. I’m even okay with something that has a sad ending too!